Glass-furnace



(No Model.)

J. DALZELL.

GLASS FURNACE.

Patented Apr. 22,1884.

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JAMES DALZELL, OF PITTSBURG, PENNSYLVANIA.

GLASS-FURNACE.

SPECIFICATION forming part of Letters Patent No. 297,114, dated April 22, 1884.

Application filed October 22, 1888. (No model.)

To all whom it may concern:

Be it known that I, J AMES DALZELL, of Pittsburg, in the county of Alleghen y and State of Pennsylvania, have invented a new and use ful Improvement in Glass-Furnaces; and I do hereby declare the following to be a full, .clear, and exact description thereof, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a vertical sectional View through the eye of a glass-furnace, showing my improvement; and Fig. 2 is a like View of a modification thereof.

Like letters of reference indicate like parts wherever they occur.

In the drawings, or represents the eye of the furnace, and b the grate-bars at the bottom thereof.

In the center of the eye a, rising from the grate-bars or foundation, as desired, is a cylindrical or other shaped burner, 0, having one or more annular rowsof perforations or holes, 6, extending through the sides near the top.

In the upper part or crown of the burner a is an air-chamber, d, the bottom of which is formed by the close partition 11. In the top and sides of this air-chamber are holes or perforations (i The bottom of the burner 0 is open, or partly closed, as desired, and extending through the same to a point near the partition d is a gas-supply pipe, f, which is provided at this point with the hollow perforated ring g. Similar rings, g 9 may also be used inside of the burner, just above the grate-bars, or below the grate-bars, as shown in the drawings. The lower end of the pipe f is connected with the main gas-pipe h.

In the sidesv of the burner c are vertical passages or air-fines 7;, preferably two or more in number, leading from the bottom of the burner or from the grate-bars into the air-chamber d. Th ese'air-passages arepreferably built of brick, and communicate at their lower ends with the air-supply pipe 9', or with the external atmosphere, or with both, as shown in Fig. 1.

Around the wall of the fire-chamber I form a spiral or otherwise arranged air flue or flues, m, to which the air finds access through lines a and ports a, made in the walls of the cave 0. These spiral flues at all terminate in an annular flue or opening, 122/, from which a number of ports, m, open into the eye of the furnace at determined intervals in the circumference. Providing the supply of gas fails, these fines are adapted for heating air in a coal burning furnace.

To prevent the drip from the pots entering the ports m, I extend the bench p ashort dis-,

tance over them and make the bottom tile, forming thelower sides of theports m inclined inward, as shown at of, Fig. 2. By this arrangement I obtain in the furnace a supply of air which is heated by contact with the hot side walls of the eye of the furnace, and is caused to enter at the sides of and above the point where the gas is discharged, so as to become thoroughly mingled therewith, producing the complete combustion of the same.

The operation is as follows: The natural gas passes from the gas well or supply tank through the pipes h andf into the rings yg g and is discharged through the perforations into the burner c, where it mingles with the air which enters through the open lower end, and, together with the same, passes through the perforations e into the eye of the furnace. Here it meets hot air from the chamber d and fines m, and uniting therewith is completely consumed. The heat rises through the eye and acts on the pots on the bench in the usual way.

In Fig. 2 I show amodification in which the air-chamber d is dispensed with, and that portion of the burner 0 above the ring 9 is perforated, so as to permit the free and general escape of the gas and air into the fire-chamber.

-In order to retardthe air which enters the grate-bars around the burner, the space between the burner and the side walls, q, may be filled with broken stone or brick, as shown at s, or this may be done in any other desired way.

While I have not shown the surrounding fiues m in Fig. 1, yet I intend to use them in both constructions.

The advantages of my improvement areas follows: The placing of the burner in the center of the furnace prevents the molten glass from the bench falling upon and destroying the pipes, such glass fallinginto the open space between the burner and the side walls, 'q. Moreover, the arranging of the gas-pipes be low the burner-cap or cage 0 protects them nace, below the level of the bench, having an from the reverberation ofthe heat from the top air-supply orifice, and a gas-supply pipe aror crown of the furnace, which would have a tendency to burn out the pipes, and also from the drip or fall of glass from the bench, as in case of the breaking of the pots. Thus the pots are protected not only from the drip of the glass, but also from the eifect of the reverberated heat from the melting-chamber above.

I do not limit myself to the number or arrangement of the rings 9, but only to placing the burner-pipes ofa centrally-placed burner under the cover of a cap or shield, which will protect them, as stated.

I do not desire to claim, broadly, the burning of natural gas in a glass-melting furnace; but

Vhat I do claim is- 1. The construction and arrangement of the devices herein described, consisting of a perforated burner situated in the eye of a glassfurnace, below the bench, having an air-supply orifice, and a gas-supply pipe arranged to admit natural gas within the burner, substantially as and for the purpose specified.

2. The construction and arrangement of the devices herein described, consisting of a perforated burner situated in the eye of a glass-furranged to admit natural gas within the burner, and a perforated air-chamber arranged above the burner and having an air-supply pipe leading thereto, substantially as and for the purpose specified.

3. The combination, in a glass-melting furnace, of a gas-burner arranged in the central part of the fire-chamber or eye, and having a space between the same and the walls of the eye, so that the drip of the pots shall fall in the space, and not on the burner, substantially as and for the purposes specified.

4. The combination, in a glass-melting furnace, of a gas-burner arranged within the central part of the eye, and having a cap or casing interposed between the gas-pipes and the crown of the furnace, substantially as and for the purpose specified.

In testimony whereof Ihave hereunto set my hand this 17th day of October, A. D. 1883.

JAMES DALZELL.

\Vitnesses:

T. B. KERR, W. B. CoRwIN. 

